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Opportunistic measurements and processing of user's context

  • US 10,201,312 B2
  • Filed: 12/08/2014
  • Issued: 02/12/2019
  • Est. Priority Date: 12/08/2014
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a work surface, including at least portions of one of;

    a keyboard, a bezel, or a back side of the apparatus, wherein the apparatus comprises one of a tablet computer or a smartphone;

    a plurality of sensors mounted on the portions of the work surface, adapted to maintain a contact with portions of user'"'"'s limbs that are in contact or interact with the work surface in a process of interaction of the user'"'"'s limbs with the apparatus, wherein the plurality of sensors include two or more electrodes to obtain readings of electrocardiographic (ECG) data, one or more optical sensors to provide photoplethysmographic (PPG) data, and one or more motion sensors to provide jitter data associated with the user, wherein the jitter data includes indications of a motion of the user'"'"'s limbs in relation to the work surface of the apparatus; and

    a processing circuitry coupled with the plurality of sensors, wherein the processing circuitry includes a processor and a memory having instructions that, in response to execution by the processor, is to collect and process the readings of the ECG, PPG, and jitter data provided by respective ones of the plurality of sensors, wherein to process includes to;

    collect a set of values from the ECG and PPG readings, including at least readings that indicate a pulse transit time, an amplitude of a PPG curve of the PPG data, and upward and downward slopes of the PPG curve;

    determine blood pressure of the user from an empirical correlation between the pulse transit time, the amplitude of the PPG curve, and the upward and downward slopes of the PPG curve;

    determine boundary values for the blood pressure of the user, by applying a logistic regression model to the set of values, wherein the boundary values indicate a normal state of the user, wherein to determine boundary values includes to adjust the boundary values over a time period using the jitter data, wherein the jitter data below a threshold is to provide ground truth data for determination of the boundary values; and

    provide an indication of a probability of the user being in the normal state, including render for display on a display of the apparatus a notification of the normal state.

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